Patents by Inventor Walid Khairy Mohamed Ahmed

Walid Khairy Mohamed Ahmed has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20170303118
    Abstract: Various aspects described herein relate to resolving failures in digital pre-distortion (DPD) training in wireless communications. A failure during DPD training can be identified for a transceiver. One or both of a severity of the failure or a type of the failure can be determined. It can also be determined whether to perform self-recovery from the failure to continue the DPD training based at least in part on one or both of the severity of the failure or the type of the failure.
    Type: Application
    Filed: April 14, 2016
    Publication date: October 19, 2017
    Inventors: Walid Khairy Mohamed AHMED, Ori AUSLENDER, Victor Alexander ABRAMSKY
  • Patent number: 9787413
    Abstract: Circuits, systems and methods that utilize two transducers, of which at least one is a piezoelectric transducer, adapted and coupled to receive and/or generate signals in the forms of sound waves, mechanical vibrations, and/or electromagnetic energy. In one version, two transducers each receive and/or generate separate vibrational energy signals that bear information. Two or more transducers coupled to a switching circuit may send or receive piezo-electrical circuit output signals that include a carrier wave having different frequencies that are within separate frequency ranges. Two or more transducers may generate output signals that are simultaneously processed by or multiplexed by a switching circuit.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: October 10, 2017
    Inventors: Walid Khairy Mohamed Ahmed, Mohsen Sarraf, Xiaopeng Huang
  • Patent number: 9780889
    Abstract: Various aspects described herein relate to calibrating transceiver impairment in wireless communications. Direct current (DC) components of one or more signals can be modified, using one or more configured DC components, for transmitting to a user equipment (UE) via a transmitter. A receiver can receive the one or more signals as transmitted via the transmitter. An impairment of at least one of the transmitter, the receiver, or a combination thereof, can be determined based at least in part on comparing the DC components of the one or more signals as received via the receiver to the one or more configured DC components. One or more components of at least one of the transmitter, the receiver, or a combination thereof can be adjusted to compensate for the impairment.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: October 3, 2017
    Assignee: QUALCOMM Incorporaeted
    Inventors: Ilya Margulis, Ran Iron, Yeuda Raz, Walid Khairy Mohamed Ahmed, Guy Wolf, Victor Alexander Abramsky
  • Publication number: 20170279545
    Abstract: Various aspects described herein relate to calibrating transceiver impairment in wireless communications. Direct current (DC) components of one or more signals can be modified, using one or more configured DC components, for transmitting to a user equipment (UE) via a transmitter. A receiver can receive the one or more signals as transmitted via the transmitter. An impairment of at least one of the transmitter, the receiver, or a combination thereof, can be determined based at least in part on comparing the DC components of the one or more signals as received via the receiver to the one or more configured DC components. One or more components of at least one of the transmitter, the receiver, or a combination thereof can be adjusted to compensate for the impairment.
    Type: Application
    Filed: April 19, 2016
    Publication date: September 28, 2017
    Inventors: Ilya MARGULIS, Ran Iron, Yeuda Raz, Walid Khairy Mohamed Ahmed, Guy Wolf, Victor Alexander Abramsky
  • Patent number: 9730165
    Abstract: Various aspects described herein relate to adjusting transmit power of a radio frequency (RF) transceiver. A total power adjustment for adjusting a transmit power of the RF transceiver can be determined. The transmit power can be adjusted to a first adjusted transmit power based at least in part on a first adjustment size that is less than the total power adjustment and determined based at least in part on the transmit power. Digital pre-distortion (DPD) training of the RF transceiver can be performed to adjust one or more coefficients for calibrating the RF transceiver based on the first adjusted transmit power. The first adjusted transmit power can be adjusted to a second adjusted transmit power based at least in part on a second adjustment size that is less than the total power adjustment and computed based at least in part on the first adjusted transmit power.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: August 8, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Walid Khairy Mohamed Ahmed, Ori Auslender, Victor Alexander Abramsky, Prashanth Hande, Ran Iron, Yeuda Raz
  • Publication number: 20170201952
    Abstract: Various aspects described herein relate to adjusting transmit power of a radio frequency (RF) transceiver. A total power adjustment for adjusting a transmit power of the RF transceiver can be determined. The transmit power can be adjusted to a first adjusted transmit power based at least in part on a first adjustment size that is less than the total power adjustment and determined based at least in part on the transmit power. Digital pre-distortion (DPD) training of the RF transceiver can be performed to adjust one or more coefficients for calibrating the RF transceiver based on the first adjusted transmit power. The first adjusted transmit power can be adjusted to a second adjusted transmit power based at least in part on a second adjustment size that is less than the total power adjustment and computed based at least in part on the first adjusted transmit power.
    Type: Application
    Filed: January 12, 2016
    Publication date: July 13, 2017
    Inventors: Walid Khairy Mohamed AHMED, Ori AUSLENDER, Victor Alexander ABRAMSKY, Prashanth HANDE, Ran IRON, Yeuda RAZ
  • Publication number: 20160308623
    Abstract: Circuits, systems and methods that utilize two transducers, of which at least one is a piezoelectric transducer, adapted and coupled to receive and/or generate signals in the forms of sound waves, mechanical vibrations, and/or electromagnetic energy. In one version, two transducers each receive and/or generate separate vibrational energy signals that bear information. Two or more transducers coupled to a switching circuit may send or receive piezo-electrical circuit output signals that include a carrier wave having different frequencies that are within separate frequency ranges. Two or more transducers may generate output signals that are simultaneously processed by or multiplexed by a switching circuit.
    Type: Application
    Filed: February 3, 2015
    Publication date: October 20, 2016
    Inventors: Walid Khairy Mohamed Ahmed, Mohsen Sarraf, Xiaopeng Huang
  • Patent number: 9467235
    Abstract: Circuits, systems and methods that utilize two transducers, of which at least one is a piezoelectric transducer, adapted and coupled to receive and/or generate signals in the forms of sound waves, mechanical vibrations, and/or electromagnetic energy. In one version, two transducers each receive and/or generate separate vibrational energy signals that bear information. Two or more transducers coupled to a switching circuit may send or receive piezo-electrical circuit output signals that include a carrier wave having different frequencies that are within separate frequency ranges. Two or more transducers may generate output signals that are simultaneously processed by or multiplexed by a switching circuit.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: October 11, 2016
    Inventors: Walid Khairy Mohamed Ahmed, Mohsen Sarraf, Xiaopeng Huang
  • Publication number: 20160164616
    Abstract: Circuits, systems and methods that utilize two transducers, of which at least one is a piezoelectric transducer, adapted and coupled to receive and/or generate signals in the forms of sound waves, mechanical vibrations, and/or electromagnetic energy. In one version, two transducers each receive and/or generate separate vibrational energy signals that bear information. Two or more transducers coupled to a switching circuit may send or receive piezo-electrical circuit output signals that include a carrier wave having different frequencies that are within separate frequency ranges. Two or more transducers may generate output signals that are simultaneously processed by or multiplexed by a switching circuit.
    Type: Application
    Filed: December 8, 2014
    Publication date: June 9, 2016
    Inventors: Walid Khairy Mohamed Ahmed, Mohsen Sarraf, Xiaopeng Huang
  • Patent number: 8208583
    Abstract: A system is provided for processing a communication signal including a baseband amplitude component and a baseband phase component. The system includes an amplitude predictor configured for closed-loop pre-distortion of a baseband amplitude component, an amplitude lookup table configured for open-loop pre-distortion of the baseband amplitude component, and an amplitude interpolator configured to build up the amplitude lookup table during a closed-loop calibration period. The system also includes a phase predictor configured for closed-loop pre-distortion of a baseband phase component, a phase lookup table configured for open-loop pre-distortion of the baseband phase component, and a phase interpolator configured to build up the phase lookup table during a closed-loop calibration period.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: June 26, 2012
    Assignee: Pine Valley Investments, Inc.
    Inventors: Ajit Kumar Reddy, Qing Li, Walid Khairy Mohamed Ahmed
  • Patent number: 8155237
    Abstract: A multi-carrier transmitter and methods thereof are provided. For example, a multi-carrier transmitter comprises a processor operable to receive a plurality of baseband signals. Each of the plurality of baseband signals correspond to a separate data communication. A modulator is in communication with the processor. A non-linear device is in communication with the modulator. The processor is further operable to combine the plurality of baseband signals to generate a composite baseband signal. The modulator is operable to modulate a carrier signal with the composite baseband signal to generate a multi-carrier signal. The multi-carrier signal is provided to an input of the non-linear device.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: April 10, 2012
    Assignee: Pine Valley Investments, Inc.
    Inventor: Walid Khairy Mohamed Ahmed
  • Patent number: 8009765
    Abstract: A digital polar transmitter includes a baseband processor configured to receive an input signal and to convert the input signal into a baseband amplitude component and a baseband phase component. The transmitter also includes a phase modulator in communication with the baseband processor. The phase modulator is configured to modulate an RF carrier signal based on the phase component and to generate a phase-modulated RF carrier signal. A power amplifier is provided in communication with the baseband processor and the phase modulator. The power amplifier is configured to amplify the phase-modulated RF carrier signal based on the baseband amplitude component and to generate an amplified RF signal. The transmitter also includes a digital feedback loop in communication with the power amplifier and the baseband processor. The digital feedback loop is configured to detect the amplified RF signal and to provide a digital amplitude feedback signal and a detected phase feedback signal to the baseband processor.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: August 30, 2011
    Assignee: Pine Valley Investments, Inc.
    Inventors: Walid Khairy Mohamed Ahmed, Qing Li, Ajit Kumar Reddy, Eoin Carey
  • Publication number: 20110085619
    Abstract: A system is provided for processing a communication signal including a baseband amplitude component and a baseband phase component. The system includes an amplitude predictor configured for closed-loop pre-distortion of a baseband amplitude component, an amplitude lookup table configured for open-loop pre-distortion of the baseband amplitude component, and an amplitude interpolator configured to build up the amplitude lookup table during a closed-loop calibration period. The system also includes a phase predictor configured for closed-loop pre-distortion of a baseband phase component, a phase lookup table configured for open-loop pre-distortion of the baseband phase component, and a phase interpolator configured to build up the phase lookup table during a closed-loop calibration period.
    Type: Application
    Filed: December 16, 2010
    Publication date: April 14, 2011
    Applicant: PINE VALLEY INVESTMENTS, INC.
    Inventors: Ajit Kumar Reddy, Qing Li, Walid Khairy Mohamed Ahmed
  • Patent number: 7889810
    Abstract: A method and apparatus for a nonlinear feedback control system is disclosed, such as for electrical and electronic systems, for pre-distorting a nonlinear device. A nonlinear feedback control system includes a nonlinear device having a first input and a first output. A detection stage is in communication with the first output of the nonlinear device. A derivation stage is in communication with the detection stage, and the derivation stage is in communication with the first input of the nonlinear device.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: February 15, 2011
    Assignee: Pine Valley Investments, Inc.
    Inventors: Walid Khairy Mohamed Ahmed, Qing Li
  • Patent number: 7869543
    Abstract: A system is provided for processing a communication signal including a baseband amplitude component and a baseband phase component. The system includes an amplitude predictor configured for closed-loop pre-distortion of a baseband amplitude component, an amplitude lookup table configured for open-loop pre-distortion of the baseband amplitude component, and an amplitude interpolator configured to build up the amplitude lookup table during a closed-loop calibration period. The system also includes a phase predictor configured for closed-loop pre-distortion of a baseband phase component, a phase lookup table configured for open-loop pre-distortion of the baseband phase component, and a phase interpolator configured to build up the phase lookup table during a closed-loop calibration period.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: January 11, 2011
    Assignee: Pine Valley Investments, Inc.
    Inventors: Ajit Kumar Reddy, Qing Li, Walid Khairy Mohamed Ahmed
  • Patent number: 7751496
    Abstract: The invention relates to a system for electromagnetic processing of an input wave involving the steps of receiving a modified signal derived from two or more signals that represent the input wave when combined; and regulating the modified signal using a digital signal containing at least one characteristic of the two or more signals. Embodiments of the invention may utilize in-phase and quadrature phase signals, where the magnitude portion of the signals may be used for regulating the modified signal. The modified signal may be created by modulating a characteristic of the I, Q signals, such as their sign, with an RF or other frequency carrier wave.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: July 6, 2010
    Assignee: Pine Valley Investments, Inc.
    Inventor: Walid Khairy Mohamed Ahmed
  • Patent number: 7656332
    Abstract: A method and apparatus for a multi-mode and multi-rate telemetry transmitter includes a digital baseband lineup, a digital-to-analog converter (“DAC”), and an analog reconstruction filter. The digital baseband lineup may be programmed to any desired bit rate, enabling the transmitter to support multi-rate capabilities. Different coefficients and numerical values may be programmed in the digital baseband lineup to support any desired modulation scheme, enabling the transmitter to support multi-mode capabilities. The digital baseband lineup may be designed by implementing up-sampling stages, down-sampling stages, and digital filters in a variety of arrangements.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: February 2, 2010
    Assignee: Cobham Defense Electronic Systems Corporation
    Inventor: Walid Khairy Mohamed Ahmed
  • Patent number: 7599418
    Abstract: A method and system for generating a frequency hopping electromagnetic signal based on a baseband data signal includes a frequency hopping pre-compensator. The frequency hopping pre-compensator determines a frequency hopping pre-compensation signal based on a desired frequency hopping sequence. The frequency hopping pre-compensation signal is combined with the baseband data signal to generate a pre-compensated baseband signal. An RF modulator modulates an RF carrier in accordance with the pre-compensated baseband signal to generate a modulated, frequency hopping RF carrier signal. An amplifier may then amplify the RF carrier signal as desired.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: October 6, 2009
    Assignee: Pine Valley Investments, Inc.
    Inventor: Walid Khairy Mohamed Ahmed
  • Patent number: 7596184
    Abstract: A modulation path synchronization apparatus in a polar transmitter includes a modulation path to receive a training waveform, a detector coupled to the modulation path, and a processor coupled to the detector. The detector is to detect a modulated training waveform. The processor is to determine a delay between the training waveform and the modulated training waveform.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: September 29, 2009
    Assignee: Pine Valley Investments, Inc.
    Inventor: Walid Khairy Mohamed Ahmed
  • Publication number: 20090202006
    Abstract: A multi-carrier transmitter and methods thereof are provided. For example, a multi-carrier transmitter comprises a processor operable to receive a plurality of baseband signals. Each of the plurality of baseband signals correspond to a separate data communication. A modulator is in communication with the processor. A non-linear device is in communication with the modulator. The processor is further operable to combine the plurality of baseband signals to generate a composite baseband signal. The modulator is operable to modulate a carrier signal with the composite baseband signal to generate a multi-carrier signal. The multi-carrier signal is provided to an input of the non-linear device.
    Type: Application
    Filed: February 7, 2008
    Publication date: August 13, 2009
    Inventor: Walid Khairy Mohamed Ahmed